mds: use the best-effort if procfs is not available

Signed-off-by: Kefu Chai <kchai@redhat.com>

diff --git a/src/mds/MDSDaemon.cc b/src/mds/MDSDaemon.cc
index 4c30b6747136bb4ecfd9355a630fe7e30d662aff..c8a83360b7bdbfb4f03e164268b08c9e4abbf916 100644 (file)
--- a/src/mds/MDSDaemon.cc
+++ b/src/mds/MDSDaemon.cc
@@ -1071,7 +1071,14 @@ void MDSDaemon::respawn()
    * unlinked.
    */
   char exe_path[PATH_MAX] = "";
-  if (readlink(PROCPREFIX "/proc/self/exe", exe_path, PATH_MAX-1) == -1) {
+#ifdef PROCPREFIX
+  if (readlink(PROCPREFIX "/proc/self/exe", exe_path, PATH_MAX-1) != -1) {
+    dout(1) << "respawning with exe " << exe_path << dendl;
+    strcpy(exe_path, PROCPREFIX "/proc/self/exe");
+  } else {
+#else
+  {
+#endif
     /* Print CWD for the user's interest */
     char buf[PATH_MAX];
     char *cwd = getcwd(buf, sizeof(buf));
@@ -1080,9 +1087,6 @@ void MDSDaemon::respawn()
 
     /* Fall back to a best-effort: just running in our CWD */
     strncpy(exe_path, orig_argv[0], PATH_MAX-1);
-  } else {
-    dout(1) << "respawning with exe " << exe_path << dendl;
-    strcpy(exe_path, PROCPREFIX "/proc/self/exe");
   }
 
   dout(1) << " exe_path " << exe_path << dendl;